CVE-2026-89610

Privilege escalation via unchecked NTFS run boundary

Published Sep 11, 2026 · Updated Sep 11, 2026

Memory corruption in Linux before 7.2.4 allows attackers to escalate privileges through a crafted NTFS filesystem image. The ntfs_mapping_pairs_decompress function validates the starting logical cluster number but fails to ensure that the decoded run length remains within the volume. Exposure requires the kernel to decode the crafted mapping-pairs array, after which the out-of-bounds access can corrupt kernel memory and elevate privileges.

CVSS severityUnavailable
Unscored
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Linux before 7.2.4 allows attackers to escalate privileges through a crafted NTFS filesystem image. The ntfs_mapping_pairs_decompress function validates the starting logical cluster number but fails to ensure that the decoded run length remains within the volume. Exposure requires the kernel to decode the crafted mapping-pairs array, after which the out-of-bounds access can corrupt kernel memory and elevate privileges.

The record

CVE
CVE-2026-89610
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <7.2.4
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6e844d4b82434a781b80d02145fd1b17cf90e3c3
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fea9e4488f384c0ef1c0e3d96b565127c1b98447

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0 <7.2.4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6e844d4b82434a781b80d02145fd1b17cf90e3c3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fea9e4488f384c0ef1c0e3d96b565127c1b98447

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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